public class roundness extends picture{

    @Override
    public void drow() {
        super.drow();
    }
    private double pai=3.14;
    private double r;

    public double getR() {
        return r;
    }

    public void setR(double r) {
        this.r = r;
    }

    public void area(double r){
       double a=r*r*pai;
        System.out.printf("%.2f",a);

    }
}
